C8051F531-C-ITR

Overview

The C8051F531-C-ITR is an automotive-grade, 8-bit microcontroller from Silicon Labs, based on the CIP-51 core. It features 8 kB of in-system programmable Flash memory and 256 bytes of internal RAM. The device includes a 12-bit ADC with up to 200 ksps throughput and 16 external inputs, alongside a programmable comparator and built-in temperature sensor. Operating at up to 25 MHz, it supports supply voltages from 2.0 V to 5.25 V and functions within a -40 °C to +125 °C range. Digital peripherals include SPI, UART, LIN 2.1 controller, three 16-bit timers, and a PCA. It is housed in a TSSOP-20 package.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for extended industrial temperature ranges.
• Integrated high-precision 24.5 MHz internal oscillator with ±0.5% accuracy supporting UART and LIN master operations.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Flexible I/O architecture with push-pull or open-drain configurations and 5 V tolerance.

Applications

• Automotive body control modules
• Industrial sensor interfaces
• LIN bus communication nodes

Procurement Notes

Verify component authenticity through authorized distributors. Confirm datasheet revision matches design requirements. Check for moisture sensitivity levels before soldering. Ensure ESD precautions are followed during handling. Validate pinout compatibility with existing PCB layouts.

Selection Notes

Evaluate memory size against application code requirements. Assess analog peripheral needs such as ADC channels and resolution. Consider clock source options for timing precision. Review power consumption modes for battery-operated systems. Verify package availability and lead times for production schedules.

Part Context

Part of the C8051F52x/F53x family, designed for cost-sensitive applications requiring high integration. Combines mixed-signal capabilities with robust digital processing. Targets markets needing reliable MCU solutions in compact form factors.

Replacement Considerations

Check for direct substitutes within the C8051F53x series. Evaluate pin-to-pin compatible alternatives from other manufacturers. Ensure functional equivalence in analog and digital peripherals.

FAQ

What is the maximum sampling rate of the integrated ADC?

The 12-bit ADC supports a programmable throughput of up to 200 ksps.

Does the device support LIN communication protocols?

Yes, it includes a LIN 2.1 controller capable of operating as both master and slave without requiring an external crystal.